Chapter 6, Problem 11STP

Interpretation Introduction

Interpretation: The electronic configuration of Arsenic needs to be written.

Concept introduction: Arsenic is an element of the p-block of the periodic table whose atomic number is 33. It belongs to the group 15 and 4^th period. To write the electronic configuration, the atomic number must be known of the element.

Answer to Problem 11STP

The electronic configuration of Arsenic is ${\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}{\text{3s}}^{\text{2}}{\text{3p}}^{\text{6}}{\text{3d}}^{\text{1}0}{\text{4s}}^{\text{2}}{\text{4p}}^{\text{3}}$ .

Explanation of Solution

The distribution of electrons in orbitals is shown by the electronic configuration. In s orbitals, a maximum of two electrons; in p orbitals, a maximum of 6 electrons and in d orbital maximum of 10 electrons can be incorporated.

The atomic number of arsenic is 33. So, its electronic configuration is ${\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}{\text{3s}}^{\text{2}}{\text{3p}}^{\text{6}}{\text{3d}}^{\text{1}0}{\text{4s}}^{\text{2}}{\text{4p}}^{\text{3}}$ .

Conclusion

Arsenic of atomic number 33 has electronic configuration, ${\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}{\text{3s}}^{\text{2}}{\text{3p}}^{\text{6}}{\text{3d}}^{\text{1}0}{\text{4s}}^{\text{2}}{\text{4p}}^{\text{3}}$ .